4.2 Skin

What is the first (top) layer of skin called?

• epidermis

• dermis

• hypodermis

Answer explanation

The first layer of skin is called the epidermis. It serves as a protective barrier and is the outermost layer, while the dermis lies beneath it and the hypodermis is the deepest layer.

What is the second (middle) layer of skin called?

• epidermis

• dermis

• hypodermis

Answer explanation

The second layer of skin is called the dermis. It lies beneath the epidermis and contains connective tissue, hair follicles, and sweat glands, playing a crucial role in skin structure and function.

What is the third (bottom) layer of skin called?

• epidermis

• dermis

• hypodermis

Answer explanation

The third layer of skin is called the hypodermis. It lies beneath the dermis and is primarily composed of fat and connective tissue, providing insulation and cushioning for the body.

Where are the sweat glands and nerves located?

• Epidermis

• Dermis

• Hypodermis

Answer explanation

The sweat glands and nerves are located in the dermis, which is the middle layer of the skin. The epidermis is the outer layer, while the hypodermis is the deeper layer beneath the dermis.

True or False: Our skin does NOT protect us from the outside environment.

• True

• False

Answer explanation

False is correct because our skin acts as a barrier, protecting us from harmful elements in the environment, such as pathogens and UV radiation.

True or False: Our skin helps to control your body's temperature by sweating when it's too hot and getting goose bumps when it's too cold.

• True

• False

Answer explanation

True. Our skin regulates body temperature by sweating to cool down when it's hot and by causing goose bumps to conserve heat when it's cold.

Epidermis keeps ____ in the body, which is very important.

• blood

• water

• nutrients

• melanin

Answer explanation

The epidermis plays a crucial role in retaining water in the body, preventing dehydration and maintaining hydration levels, which is essential for overall health.

What sense do we need skin for?

• touch

• taste

• sight

• hearing

• smelling

Answer explanation

We need skin for the sense of touch. Skin contains receptors that allow us to feel sensations like pressure, temperature, and pain, making it essential for our tactile experiences.

Where can you find dead skin cells?

• Your innermost layer of skin

• Your outermost layer of skin

• The border between the epidermis and the dermis

• The border between the dermis and the hypodermis

Answer explanation

Dead skin cells are found in your outermost layer of skin, known as the epidermis. This layer constantly sheds dead cells, which is a natural part of skin renewal.

Tags

NGSS.MS-LS1-3

What layer of skin is this

• hypodermis

• epidermis

• dermis

• pore

Answer explanation

The dermis is the layer of skin located beneath the epidermis. It contains connective tissue, hair follicles, and sweat glands, making it essential for skin strength and elasticity, unlike the hypodermis or epidermis.